All categories

2 years ago

Solve for x: -2x – 7 = 3

Mathematics

2 answers:

alukav5142 [94]2 years ago

8 0

Answer:

x = -5

Step-by-step explanation:

Add 7 to each side, so it now looks like this: -2x = 10
Divide each side by -2 to cancel out the -2 next to x. It should now look like this: x = -5

I hope this helps!

oksian1 [2.3K]2 years ago

5 0

Answer:

x=-5

Step-by-step explanation:

-2x=3+7

or,-2x=10

or,x=-10/2

x=-5

You might be interested in

Amanda uses a rectangular canvas for a panting. The length is 6x-3 centimeters The width is 2x+6 centimeters,and is 4/5of the le

julia-pushkina [17]

Answer:

15 cm by 12 cm.

Step-by-step explanation:

Given:

Amanda uses a rectangular canvas for a panting.

The length is $6x-3$ centimeters.

The width is $2x+6$ centimeters, and is 4/5 of the length .

Question asked:

.What are the dimensions of the canvas ?

Solution:

As given that the width is $\frac{4}{5}$ of the length.

$2x+6=\frac{4}{5} (6x-3)\\ \\ 2x+6=\frac{4}{5}\times6x-\frac{4}{5}\times3\\ \\ 2x+6=\frac{24x}{5} -\frac{12}{5} \\ \\$

Adding both sides by $\frac{12}{5}$

$2x+6+\frac{12}{5} =\frac{24x}{5} -\frac{12}{5}+\frac{12}{5}\\ \\ 2x+\frac{42}{5} =\frac{24x}{5}$

Subtracting both sides by $2x$

$2x-2x+\frac{42}{5} =\frac{24x}{5} -2x\\ \\ \frac{42}{5} =\frac{24x-10x}{5} \\ \\ \frac{42}{5} =\frac{14x}{5} \\ \\$

By cross multiplication:-

$5\times14x=5\times42\\ \\ 70x=210\\ \\$

By diving both sides by 70

$x=3$

Now, substituting the value:-

The length = $6x-3$ cm

= $6\times3-3=18-3=15\ cm$

The width = $2x+6$ cm

= $2\times3+6=6+6=12\ cm$

Thus, length and width of canvas are 15 cm and 12 cm.

7 0

3 years ago

A building across the street casts a shadow that is 2424 feet long. Your friend is 66 feet tall and casts a shadow that is 44 fe

salantis [7]

If 66 feet is a typo for 6 feet, then the answer is 330 feet long. Multiply 6•7.34= 44.04 round to 44. 2424/7.34= 330.245 round to 330. This is the height of the building.

If there is no typo 66/3= 22•2= 44

2424/3= 808•2= 1,616 feet tall.

8 0

3 years ago

Read 2 more answers

On a factory floor, 30 out of every 140 toy robots is defective. What percent is defective?

yaroslaw [1]

Answer:

$21.43\%$

Step-by-step explanation:

we know that

To find out the percent of robots which are defective, divided the number of defective robots by the total number of robots and multiply the result by 100

Let

x ----> the number of defective robots

y ----> the total number of robots

p ---> percentage of robots which are defective

$p=\frac{x}{y} (100)$

we have

$x=30\\y=140$

substitute

$p=\frac{30}{140}(100)$

$p=21.43\%$

5 0

3 years ago

A rate where the second number is a 1 is called a ________. Choose the answer that best completes the sentence.

Veronika [31]

Unit rate because unit is referring to one so for example for every unit, there are 6 apples. The unit in the case would be a box

8 0

2 years ago

Read 2 more answers

Which statements about the number properties are true? Choose all answers that are correct. A. The associative property applies

IrinaK [193]

The statements about the number properties are true are the below: A. The associative property applies to multiplication. C. The associative property applies to addition. D. The commutative property applies to multiplication. The commutative cannot be apply to subtraction because of the changing the request of 6-2-1 to 2-6-1 is not a similar thing.

6 0

3 years ago